I will need a new exhaust catalyst shortly. I have a 2003 MK 2.5 Sport 1.8.Mx5 parts do not have one in stock and also state that Mazda no longer make them. The MK 2.5 model apparently has a different catalyst to the standard MK 2, for which catalysts are readily available.Can anyone help please?

I checked the link to the EBay site you indicated and have emailed my registration number to them at their request for them to check compatibility. I believe the MK 2.5 sport has a different length catalyst to the standard MK 2.